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发布者:微桥 发布时间:2011/6/29 阅读:6343次    关键字: EML3022 Synchronous DC-DC
EML3022-Dual Channel 1A Synchronous Buck Regulator


EML3022-Dual Channel 1A Synchronous Step-Down Regulator DataSheet

General Description
      EML3022 is designed with high efficiency step down DC/DC converter and supports dual channel for portable devices applications. It features with extreme low quiescent current with no load which is the best fit for extending battery life during the standby mode.
      The device operates from 2.5V to 5.5V input voltage and up to 1A output current capability. High 1.5MHz internal frequency makes small surface mount inductors and capacitors possible and reduces overall PCB board space. Further, build-in synchronous switch makes external Schottky diode is no longer needed and efficiency is improved.
      EML3022 is designed base on Pulse Width Modulation (PWM) for low output voltage ripple and fixed frequency noise, while Pulse Frequency Modulation (PFM) is used to improve light load efficiency, and Low Dropout (LDO) Mode provides 100% duty cycle operation. Low reference voltage is designed for achieving regulated output down to 0.6V.
      The device is available in an adjustable version in E-SOP-8L package.

Features
 Achieve 97% efficiency
 Input Voltage : 2.5V to 5.5V
 Output Current up to 1A
 Reference voltage 0.6V
 Quiescent Current 30μA with No Load
 Internal switching frequency 1.5MHz
 No Schottky Diode needed
 Low Dropout Operation: 100% Duty Cycle
 Shutdown current < 1μA
 Excellent Line and Load Transient Response
 Over-temperature Protection

Applications
 Blue-Tooth devices
 Cellular and Smart Phones
 Personal multi-media Player (PMP)
 Wireless networking
 Digital Still Cameras
 Portable applications

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